package com.mywind.util;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UrlCheckServlet extends HttpServlet implements Filter {
	private static final long serialVersionUID = 1L;

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		String usercode = (String) request.getRemoteUser();// 登录人
		String url = request.getRequestURI();

		if (usercode == null || "".equals(usercode)) {
			// 判断获取的路径不为空且不是访问登录页面或执行登录操作时跳转
			if (url != null && !"".equals(url)) {
				response.sendRedirect(request.getContextPath()
						+ "/user/toLogin.do");
				return;
			}
		}
		arg2.doFilter(arg0, arg1);
		return;
	}

	public void init(FilterConfig arg0) throws ServletException {
	}

}